Has anyone managed to get a stage 2 sickness removed from their record?

Im currently off long term sick post broken leg + surgery + complications, I've been suitable for alternative duties as cleared by occu health and my doc as of the end of Jan, however my manager didnt know they had to fill any paperwork out, just seemed to assume that things would get done without her or my involvement? I am now on alternative duties however did trigger a stage 2 as a result of the delay. There were multiple alternative roles that were suitable in this time so it is not a matter of them not being available, it is purely because they didnt know they had to fill out a form(theyre new, ish) , didnt confirm with any other managers or realise until admin got back to them and told them to do the paperwork. Ive got emails of me chasing, and a distinct lack of replies from them, has anyone successfully challenged it? I hit a stage 2 a few years ago for sickness which is fair enough but id rather not have this one on my record when I feel like this one isnt my fault